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  4. The direction of ray of light incident on a concave mirror is shown by PQ while directions in which the ray would travel after reflection is shown by four rays marked 1, 2, 3 and 4. Which of the four rays correctly shows the direction of reflected ray? <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/fb2eebaee30bc0f4449b5fcdbe90a262-.png />

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Q. The direction of ray of light incident on a concave mirror is shown by $PQ$ while directions in which the ray would travel after reflection is shown by four rays marked $1, 2, 3$ and $4$. Which of the four rays correctly shows the direction of reflected ray?
image

Ray Optics and Optical Instruments

Solution:

In spherical mirrors, the incident ray passing through the focus of mirror becomes parallel to principal axis after reflection, which is shown by ray $2$.